<template>
  <div class="login_body">
    <div class="bg" />
    <div class="box">
      <div class="title">智慧园区-登录</div>
      <!-- 表单校验四要素 -->
      <!-- 1.el-form  :model 对应的值 是表单对应的数据对象 -->
      <!-- 2.el-form :rules 对应的校验规则 -->
      <!-- 3.el-form-item prop 表示要校验那个字段 -->
      <!-- 4.表单元素（el-input/el-checkbox...）v-model -->
      <el-form ref="form" :model="formData" :rules="rules">
        <el-form-item label="账号" prop="username">
          <el-input v-model="formData.username" />
        </el-form-item>

        <el-form-item label="密码" prop="password">
          <el-input v-model="formData.password" type="password" autocomplete="off" show-password />
        </el-form-item>

        <el-form-item>
          <el-checkbox v-model="rememberMe">记住我</el-checkbox>
        </el-form-item>

        <el-form-item>
          <el-button type="primary" class="login_btn" @click="submitForm()">登录</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import { FORM_KEY } from '@/constants/KEY'
export default {
  name: 'Login',
  data() {
    return {
      formData: {
        username: '',
        password: ''
      },
      rememberMe: true,
      rules: {
        username: [{ required: true, message: '账号不可为空', trigger: ['blur', 'change'] }, // 失焦和内容改变会触发校验
          { min: 3, max: 8, message: '长度在 3 到 8 个字符', trigger: ['blur', 'change'] }
        ],
        password: [{ required: true, message: '密码不可为空', trigger: ['blur', 'change'] },
          { min: 3, max: 8, message: '长度在 3 到 8 个字符', trigger: ['blur', 'change'] }
        ]
      }
    }
  },
  mounted() {
    const cacheFormStr = localStorage.getItem(FORM_KEY)
    if (cacheFormStr) {
      const cacheFormData = JSON.parse(cacheFormStr)
      this.formData.username = cacheFormData.username
      this.formData.password = cacheFormData.password
    }
  },
  methods: {
    submitForm() {
      this.$refs.form.validate(async(valid) => {
        if (!valid) return
        await this.$store.dispatch('user/doLogin', this.formData)
        if (this.rememberMe) {
          localStorage.setItem(FORM_KEY, JSON.stringify(this.formData))
        } else {
          localStorage.removeItem(FORM_KEY)
        }

        this.$message.success('登录成功')
        // 实现那个页面退出的，登陆时继续跳转至对应的页面
        // console.log(this.$route.query.redirect) 拿到退出时的路由
        if (this.$route.query.redirect) {
          this.$router.push(this.$route.query.redirect)
        } else {
          this.$router.push('/')
        }
      })
    }
  }
}

</script>

<style scoped lang="scss">
.login_body {
  display: flex;
}
.bg {
  width: 60vw;
  height: 100vh;
  background: url('~@/assets/login-bg.svg') no-repeat;
  background-position: right top;
  background-size: cover;
}
.box {
  margin: 200px 10% 0;
  flex: 1;
  .title {
    padding-bottom: 76px;
    font-size: 26px;
    font-weight: 500;
    color: #1e2023;
  }
  ::v-deep() {
    .ant-form-item {
      display: flex;
      margin-bottom: 62px;
      flex-direction: column;
    }
    .ant-form-item-label label {
      font-size: 16px;
      color: #8b929d;
    }
    .ant-input,
    .ant-input-password {
      border-radius: 8px;
    }
  }
}
.login_btn {
  width: 100%;
}
</style>
